

The Assos Ultraz Winter LS Skin Layer P1 is the warmest foundational layer for winter's coldest, most extreme conditions, refined with an ultra-high collar, additional odorControl, and a highly elastic wool blend for body-mapping insulation.
Merino wool and a highly elastic, highly insulating synthetic blend provide the most insulation of any Assos skin layer, with an updated neck-warmer collar construction that extends the protection. The ultrasoft textile doesn't irritate like wool, and its high elasticity means it also doesn't lose its shape when it stretches. Instead, it moves with your body, maintaining a low-volume, next-to-skin fit to trap warmth and expel moisture – both of which are critical for comfort in deep winter.
B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.
| 0 | I | II | III | XL | XXL | |
| Chest | 35.4"-37.8" | 39.4"-40.2" | 43.3"-45.7" | 45.7"-0" | 0" | 0" |
Sleeve Type: Long Sleeve | |
Calypso Blue - 0 | Mfg PartNum: P11.40.455.29.0 |
Calypso Blue - I | Mfg PartNum: P11.40.455.29.I |
Calypso Blue - II | Mfg PartNum: P11.40.455.29.II |
I don't normally wear assos gear, but this is an exception. It is far and away the warmest base layer I've ever used, and it breaths well too. I was skeptical about using a synthetic material over merino wool but this too changed my mind. Perfect to pair with a jacket or midlayer and shell for a cold winter ride. This is what I grab for temps below 40 degrees on the bike or for a run.

